Portion of a fuel tank for a motorcycle

FIG. 1 is side view of a portion of a fuel tank for a motorcycle of the design shown as typically mounted on a motorcycle;

FIG. 2 is a perspective view of the portion of a fuel tank of the design as seen from the top and a side;

FIG. 3 is a side elevation view thereof, the opposite side being a mirror image;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Where included, broken lines showing environment or structure are for illustrative purposes only and form no part of the claimed design. The portion of a fuel tank for a motorcycle in FIGS. 2-7 is shown on an enlarged scale.